表面上方微粒及微粗糙度偏振光散射特性

Polarized light scattering of particle above a surface and surface microroughness

为了区分由表面上方微粒和表面微粗糙度两种散射机理引起的散射光,利用偏振双向反射分布函数,并借助于由,■,■组成的正交右手基组表示了入射电场和散射电场。从理论上给出了两种不同散射机理在不同偏振状态下的双向反射分布函数与入射面外方位角之间的变化关系,并通过对这两种散射机理下的偏振双向反射分布函数的比较发现,利用p偏振入射产生的p偏振散射光(BRDFpp)可以将表面上方微粒和表面微粗糙度两种散射机理区分开来。

In order to distinguish light scattering between small particle above a surface and surface microroughness and identify the scattering sources of two kinds of scattering mechanisms,the polarized bidirectional reflectance distribution function（P-BRDF） is researched by use of ,■,■ right handed basis set.Four kinds of polarized BRDFs changing with azimuth angle is calculated and compared.The result shows that the scattering mechainsm of particle above a surface and surface microroughness can be distinguished ...